Which of the following is a primary goal of criminal investigation?

A primary goal of criminal investigation is to gather evidence for legal proceedings. This involves collecting, preserving, and analyzing evidence that can be presented in court to support the prosecution's case. This process is critical in establishing the facts of a case, ensuring that justice is served based on reliable information.

Gathering evidence involves various techniques such as interviewing witnesses, examining crime scenes, and utilizing forensic science. The results of these investigations not only help in identifying and apprehending suspects but also play a vital role in the judicial process, ultimately helping to uphold the rule of law and the rights of individuals involved in the case.

While other options might relate to aspects of law enforcement work or broaden the effectiveness of investigations, they do not represent the primary focus of criminal investigations in the same direct way that evidence collection does. For instance, punishing offenders immediately does not align with the investigative role, which centers on gathering facts before any legal action. Maintaining public relations and coordinating with other agencies are important functions in law enforcement but are secondary to the fundamental objective of obtaining evidence necessary for prosecution.